Question 44Asked in CTET August 2023 Paper 2 Maths & Science, 20 Aug 2023

ABCD is a rhombus in which ∠ADB = 25°. Then, the value of (2∠BAD – ∠ABC) is:ABCD एक समचतुर्भुज है, जिसमें ∠ADB = 25° है । तब, (2∠BAD – ∠ABC) का मान है :

ABCD एक समचतुर्भुज है, जिसमें ∠ADB = 25° है । तब, (2∠BAD – ∠ABC) का मान है :
  1. A230°230°
  2. B240°240°
  3. C210°210°
  4. D260°260°
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Correct answer: (C) 210°210°

Explanation

A diagonal of a rhombus bisects the vertex angles, so ∠ADC = 2 × 25° = 50° and ∠ABC = 50°, ∠BAD = 180° – 50° = 130°. Then 2 × 130° – 50° = 210°.समचतुर्भुज का विकर्ण शीर्ष कोणों को समद्विभाजित करता है, इसलिए ∠ADC = 2 × 25° = 50° और ∠ABC = 50°, ∠BAD = 180° – 50° = 130°। तब 2 × 130° – 50° = 210°।

From CTET August 2023 Paper 2 Maths & Science, 20 Aug 2023 — Previous Year Paper

This is question 44 of CTET August 2023 Paper 2 Maths & Science, 20 Aug 2023 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.